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Quick Answer

Open the Start menu, type Disk Cleanup, select your C: drive, check all the boxes for temporary files and the Recycle Bin, and click OK.

How to Fix "Low Disk Space" or "Disk Full" Errors on Windows ​

Applies to: Windows 11, Windows 10, OneDrive for Business
Article Type: Troubleshooting
Last Updated: 2026-06-18

Summary ​

When your disk runs out of space, Windows slows down, apps stop installing, and file saves start failing. This article walks you through identifying what is consuming your storage and reclaiming space fast — starting with the quickest wins and progressing to more thorough methods. Every step works without admin rights.

Prerequisites ​

  • Windows 10 or Windows 11 (any edition).
  • OneDrive for Business signed in and syncing (required for Methods 5 and 6).
  • No admin rights are required for any step in this article.

Instructions ​

1. Triage — Identify What Is Filling Your Drive (2 Minutes) ​

Before deleting anything, find out where the space went. Cleaning blindly wastes time.

  1. Press Windows + I to open Settings.
  2. Click System in the left sidebar.
  3. Click Storage. Wait a few seconds for Windows to calculate usage.
  4. A breakdown appears showing categories such as Apps & features, Temporary files, Other, and OneDrive. Note which categories are consuming the most space.
  5. For a deeper look at specific large files, open File Explorer and type one of these search operators in the search bar:
    • size:large — finds files between 1 MB and 128 MB.
    • size:huge — finds files between 128 MB and 1 GB.
    • size:gigantic — finds files larger than 1 GB.
  6. Sort results by Size (largest first) to spot the biggest offenders — old downloads, meeting recordings, or forgotten ZIP files are common culprits.

Verification: You can now see exactly which categories and individual files are consuming the most space, and you know where to focus your cleanup.

2. Delete Temporary Files — Quick Win (2 Minutes) ​

Windows accumulates temporary files from updates, browser caches, and diagnostic logs. These are safe to remove and often reclaim several gigabytes.

  1. From the Storage screen (Settings > System > Storage), click Temporary files.
  2. Windows scans and presents a list of removable categories. Common items include:
    • Temporary files — leftover app data.
    • Delivery Optimization Files — Windows Update cache shared across your network.
    • Thumbnails — cached image previews (Windows regenerates them automatically).
    • Windows Update Cleanup — old update packages that are no longer needed.
  3. Select the categories you want to remove. Leave "Downloads" unchecked unless you are certain you no longer need those files.
  4. Click Remove files and confirm when prompted.

Verification: Return to Settings > System > Storage and confirm the used space has decreased.

3. Empty the Recycle Bin (30 Seconds) ​

Deleted files stay in the Recycle Bin until it is emptied — they still consume disk space.

  1. Locate the Recycle Bin icon on your desktop. If it is not visible, search for Recycle Bin in the Start menu.
  2. Double-click to open it and review the contents. Look for any files you may still need.
  3. Click Empty Recycle Bin in the toolbar at the top.
  4. Confirm the deletion when prompted.

Verification: The Recycle Bin icon changes from a full bin to an empty bin. The space is immediately reclaimed.

4. Clear Browser Cache and Old Downloads (3 Minutes) ​

Web browsers cache large amounts of data over time, and the Downloads folder often holds forgotten installers and attachments.

Clear the browser cache:

  1. Open Microsoft Edge (or Google Chrome).
  2. Press Ctrl + Shift + Delete to open the Clear browsing data dialog.
  3. Set Time range to All time.
  4. Check Cached images and files. Optionally check Browsing history if desired.
  5. Click Clear now.

Audit the Downloads folder:

  1. Open File Explorer and navigate to Downloads (in the left sidebar under Quick access).
  2. Sort by Size (click the Size column header).
  3. Delete old installers (.exe, .msi), ZIP files, and large attachments you no longer need.

Verification: Check the storage breakdown again in Settings > System > Storage to confirm the reclaimed space.

5. Free Up Space with OneDrive — Cloud-Only Files ⭐ (5 Minutes) ​

This is often the single most effective method. OneDrive's Free up space feature removes the local copy of a file while keeping it safely stored in the cloud. The file remains visible in File Explorer and re-downloads automatically when you open it.

DANGER

No data is deleted. The file icon changes to a cloud icon (☁️) indicating it is online-only. The file is still accessible — opening it downloads it automatically. You need an active internet connection to access cloud-only files.

Free up space for individual files or folders:

  1. Open File Explorer and navigate to your OneDrive folder (in the left sidebar).
  2. Right-click the file or folder you want to move to cloud-only.
  3. Select Free up space.
  4. The file's status icon changes from a green checkmark (✅) to a blue cloud (☁️).

Free up space in bulk:

  1. Open File Explorer and navigate to your OneDrive folder.
  2. Select multiple files or an entire folder (press Ctrl + A to select all within a folder).
  3. Right-click the selection and choose Free up space.
  4. All selected items switch to cloud-only status instantly.

Understanding file status icons:

IconStatusMeaning
☁️ Blue cloudOnline-onlyFile is in the cloud only. No local space used.
✅ Green checkmarkAvailable locallyFile is downloaded and stored on your PC.
🔵 Blue arrowsSyncingFile is currently uploading or downloading.
⬜ White checkmarkAlways keep on this deviceFile is pinned locally and will not be freed automatically.

Verification: The selected files show cloud icons, and the free space on your drive increases immediately.

6. Remove Apps You No Longer Use (3 Minutes) ​

Unused applications can consume several gigabytes. Sorting by size reveals the biggest candidates.

  1. Open Settings > Apps > Installed apps.
  2. Click the Sort by dropdown and select Size (Large to small).
  3. Identify apps you no longer use — old tools, games, or trial software.
  4. Click the three-dot menu (⋯) next to the app and select Uninstall.
  5. Follow the prompts to complete the removal.

Verification: Return to Settings > System > Storage and confirm the freed space.

7. Find and Move Large Files (5 Minutes) ​

If your triage in Method 1 revealed large files outside of OneDrive — such as personal videos, exported recordings, or database backups — you can move them to free up local space.

  1. Open File Explorer.
  2. Navigate to the drive that is full (usually C:).
  3. In the search bar, type size:gigantic and press Enter.
  4. Wait for results to load — this searches the entire drive and may take a minute.
  5. Review the results. Common large files include:
    • Teams meeting recordings (.mp4 files in OneDrive or Downloads).
    • Old ZIP archives or backup files.
    • Large Excel or PowerPoint files with embedded images.
  6. For each file, decide whether to:
    • Delete it if no longer needed.
    • Move it to OneDrive so it can be freed up to cloud-only (Method 5).
    • Copy it to an external USB drive if it must be kept locally but not on your main drive.

Verification: Re-check drive space in File Explorer. The drive bar should return to blue.

8. Enable Storage Sense to Prevent Recurrence (2 Minutes) ​

Storage Sense runs automatically in the background to prevent the disk from filling up again.

  1. Open Settings > System > Storage.
  2. Toggle Storage Sense to On.
  3. Click Storage Sense to configure:
    • Run Storage Sense: Choose During low free disk space or Every week.
    • Temporary files: Check Delete temporary files that my apps aren't using.
    • OneDrive: Set Files become online-only if not opened for more than: to 30 days or 60 days.
    • Recycle Bin: Set to auto-empty items older than 30 days.
    • Downloads: Optional — set a cleanup period or leave as Never to manage manually.
  4. Optionally click Run Storage Sense now at the bottom for an immediate cleanup.

Verification: Storage Sense is toggled on. Automated cleanup will now run on the schedule you configured, preventing future "Low Disk Space" warnings.

9. When to Contact IT ​

Put three things in the ticket and IT can act on it straight away: the drive letter, the free space figure shown in Settings > System > Storage, and which of the methods above you already ran. That is what tells them whether this is a cleanup, a bigger disk, or a failing drive.

Contact your IT helpdesk if:

  • You have followed all steps above and the disk is still critically full — the remaining files may be system-managed and require admin-level cleanup.
  • You see errors related to disk hardware health such as Windows detected a hard disk problem — this is a different issue that IT must investigate.
  • Your device is encrypted with BitLocker and you are unable to access certain partitions or recovery drives.
  • The "Low Disk Space" warning appears for a drive other than C: (such as D: or a recovery partition) — these partitions are managed by IT or the device manufacturer.
  • You cannot uninstall certain apps because they are managed by your organization through Intune or Group Policy.

Troubleshooting ​

TIP

For the fastest results, start with Method 5 (OneDrive Free Up Space). In most corporate environments, OneDrive files are the single largest consumer of local disk space, and converting them to cloud-only is instant, reversible, and risk-free.

Symptom / ErrorPotential CauseSolution
Drive bar is red but Storage shows nothing largeHidden system files consuming spaceRun Disk Cleanup via Settings > System > Storage > Temporary files (Method 2). System files like update caches are hidden from File Explorer.
"Free up space" option missing in right-click menuOneDrive not signed in or not syncingOpen the OneDrive app from the system tray and sign in. Ensure sync is active before retrying.
Cannot delete a file — "file is in use"An application has the file openClose the application using the file, or restart your computer and try again.
Disk full again within days of cleanupNo automated cleanup configuredEnable Storage Sense with OneDrive offloading (Method 8) to prevent recurrence.
Cannot uninstall a particular appApp managed by your organizationAsk IT to remove the app from your device, naming the app and the space it uses in the Storage list. Centrally deployed apps cannot be removed by the user.
Storage settings show "OneDrive" using many GBOneDrive files synced locallyUse Method 5 to convert OneDrive files to cloud-only. This is the intended solution.
"Not enough disk space" error during Windows UpdateUpdates require temporary staging spaceFree at least 10 GB using Methods 2–5, then retry the update via Settings > Windows Update.